Picking mechanism for looms



P 1949- G. c. BEATRICE 2,481,812

PICKING MECHANISM FOR LOOMS Filed 001;. 7, 1948 FIGJ FIGS 4 INVENTOR GABRIEL 0. BEATRICE 'ATTORNEY Patented Sept. 13, 1949 UNITED STATES PATENT OFFlCE This invention relates to improvements in picking mechanism for looms and it is the general object of the invention to provide an improved picking arm and roll constructed to reduce vibration and absorb shock.

A well-known type of picking mechanism utilizes a cam on the loom bottom shaft for engagement with a roll carried by an arm on the picking shaft. Another type has an arm on the bottom shaft carrying a roll on the picking shaft. In the past the roll has A generally been solid metal and mounted for rota- 20 tion directly on the arm which supports it. When picking mechanisms using this type of roll op- PICKING MECHANISM FOR LOOMS Gabriel 0. Beatrice, Shrewsbury, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application October 7, 1948, Serial No. 53,329

6 Claims. (01. 139-147) rear end thereof being shown in Fig. 2 as supported by one of its bearings indicated at l6. Shaft I5 is provided with a downwardly extending arm I! operatively connected at its lower 5 end to a sweep stick l8 the left end of which as viewed in Fig. 1 carries a lug strap I9 extending around the picker stick 20 of the loom. The latter is pivoted as at 2| on the rocker iron 22 which is fastened to the usual rocker shaft 23. which engages a cam The latter ordinarily supports the lay 24 of the loom along which the shuttle is picked by stick The matter thus far described is duplicated at the opposite end of the loom and is of usual conerate at high speed. there is likelihood that some struction and operates in the ordinary manner.

part of the mechanism will break due to vibration or shock.

It is an important object of the present invention to construct the picking roll with an outer mounted on the arm which supports the roll.

The invention set forth herein is applicable to various types of picking mechanism, but is shown herein as applied to the so-called cone picking mechanism used high speed looms.

With these and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described and set forth. 40 S e 4| need I10 be Strictly Cylindrical and may if desired be slightly crowned. The inner surface of shell 4|) is provided with a bearing surface 42 which in longitudinal cross section parallel to the gudgeon is convex toward the cluding the subject matter of this invention, 45 latter, see Fig. 3. The convexity of surface 42 is attained by forming the surface with two tapered or conical areas 43 and 44 at the right and left, respectively, as seen in Fig. 3, these areas being inclined toward each other and toward the gud- 50 eon so that the diameter of the inner surface 42 at the longitudinal center of the picking shell is less than its diameter at the ends of the shell. Located between the picking shell 43 and the inner shell 29 are two shock absorbing sleeves 45 and 46 having outer conical surfaces 4! engaging and conforming to the corresponding conical These sleeves are made .of an inherently resilient shock absorbing material, such for instance as a soft elastic rubber, and 60 substantially fill the space between the two shells,

In the accompanying drawings, wherein a convenient embodiment of the invention is set forth, Fig. 1 is a front elevation of one end of a loom having applied thereto a picking mechanism in- Fig. 2 is a vertical section on line 2--2, Fig. 1, Fig. 3 is an enlarged vertical section on line 3-3, Fig. 2, and

Fig. 4 is a vertical transverse section on line 4-4, Fig. 3.

Referring particularly to Fig. 1, the loom frame l0 supports a bottom shaft I mounted in appropriate bearings and rotating ordinarily once every other pick of the loom. Secured to this shaft is a cam designated generally at |Z having a cam tappet |3 which may be shown, in Fig. 2. A picking shaft |5 extendsbackwardly and forwardly in the loom transverse of the bottom shaft H and is mounted for rotation in the loom at both its front and back ends, the

ing rollers 28.

in Fig. 3. and confine lubricant.

Referring more particularly to Figs. 3 and 4, i the picker shaft 5 has extending laterally therefrom a picking arm 25 which may be secured to the shaft in any approved manner, or be formed metallic picking shell supported by a sleeve or in rally therewith. Arm is provided with the like made of shock absorbing material, such as soft elastic rubber, thereby reducing vibration and shock.

It is a further object of the invention to provide an integral flange 2B and a gudgeon 21 supporting a needle or roller bearing B including bear- Engaging the outer peripheries of the latter is a bearing shell 29 between which the picking roll with a picking shell the inner 25 nd the ud n ar loca ed ri ht nd left resurface of which is tapered to fit the tapered surface of the shock absorbing means so that the shell will be held centered on the roll. The shock absorbing means may include sleeves of conical form held against endwise motion by flanges 30 is reduced as at 32 and provided with screw threads 33 to receive a nut 34 which engages a disk 35 surrounding the reduced end 32 of the gudgeon. A second disk 36 engages the flange 26, and the rollers, bearing shell 29, and retainer tainer rings 30 and 3|, respectively, as viewed These rings position the rollers 28 As shown in Fig. 3, the left end of the gudgeon on t i ki d of 35 rings 30 and 3| lie between the disks 35 and 36.

- Surrounding the inner or bearing shell 29 and concentric therewith is an outer picking shell 40 having preferably an outer cylindrical surface 4| for engagement with the cam tappet l3.

of the general shape areas 43 and 44.

This

3 this space being wider at its ends than at its center, see Fig. 3. The sleeves have inner cylindrical surfaces 4& fitting the 'outercylindrical peripheryidll or the innershellf29i" 'The resilient sleeves are located between the disks 35 and 36 which limit substantial endwise movement of the sleeves away from each other. Picking shell 40 is also between the disks, but duetotlie' centering effect of the conical engaging-l surfaces of the;

shell 40 and the resilient sleeves;'ishellz4fl tends normally to be spaced from the disks: "Dhefldeaning B, bearing shell 29, sleeves 45 and 46,,and.

picking shell 40 may be considered to be a pick ing roll R rotatable on the gudgeon 21 From the foregoing it will be seen that the invention setsrforth alsimple form. of. pickingroll for loom picking mechanism wherein anrouter metallic sleeve adapted for engagement with a picking. cam is mounted elm-inherently resilient sleeves 45- and 46- made preferably of inherently, resilient elastic. material such. as soft rubber. The sleeves are mounted-on an inner bearing shell.29 forming part-0f a-needle or roller bearing B rotatable onthe gudgeon 21. The resilient sleeves are the only part of thestructurez which engages the picking shell 40, and' the latter is centered on the sleeves due to engagement of the tapered surfaces on-qthe picking sheila with similar surfaces on. the resilient shock absorb:- ingv sleeves 45.- and 45:- The'sleeves frictionally engage the shells 29 and'4lland will ordinarily be held by such engagement against-endwise- I. In picking mechanism for a loomhaving: a

picking cam and apicking shaft provided; with an arm, a bearing shell surrounding part-of the arm, bearing rollers between the shell: and: arm, apicking: shell surrounding the bearing shellhav ing an inner surface formed. with conical areasi inclined t'oward eachother. and'toward the' armg;

inherently; resilient soft. elastic sleeves between: said shells having inner surfaces" engaging; the: bearingshell and having conical outer surfaces: engaging the conical surfaces of thepickingshell, and spaced disks onthearmbetweenwhich the: shells and sleeves are located.-

2; In pick ing mechanism 'fora loomthavingi a:

picking camand a pickingvshaft provided with: an

arm, a'roller bearing on said arm' havingfa cylin drical: bearing shell; a picking shell; spaced from and surrounding and concentricwith: the bearing: shell, the inner surface ofthebearing shellbeing: tapered from the ends thereof toward the longi tudinalf center thereof-and. towardv said bearing shell, inherently resilient soft elastic sleeves be.- tween the bearing and picking sleeves-having; exterior surfaces engaging and conforming-ta the shape of said inner surface of the picking: shell and having inner surfaces engaging the bearing shell, and disks onthe arm preventing substantial movement of the picking shell and sleeves in a direction parallel to the aXis of the cylindrical bearing shell.

3. In picking mechanism for a loom having a picking cam and. a picking shaft provided with an arm, a cylindrical gudgeon on said. arm, a roller bearing on said gudgeon having a cylindrical shell having an outer surface concentric with the gudgeon, a picking shell spaced from and 'surrounding'the bearingg'sh elland havin an inner surface which atthe longitudinal center thereof is of less diameter than at the ends thereof, inherently resilient soft elastic sleeve means located betweensaid shells having inner surfaces engaging saidouter cylindrical surface'of said bearings-hell: and: having outer surfaces conforming rto and 'engaging said inner surface of the picking: shell; and spaced disks on the arm preventing, substantial endwise movement of the, picking sl'iell"and"s1eeve means in a direction par allelto the gudgeon.

4. In picking mechanism for a loom having a pickingarm and. gudgeon thereon, a cylindr-ica1 bearing shell. supported. by and rotatable, aroundsaid gudgeon, a: picking shell surroundinganrl spaced from the bearing shell, saidpicking-shellhaving an inner surface facing thev bearingshell and convex toward the-latter incross sectionlparallel to the length: ofv thegudgeon, inherentlyy resilient soft elastic sleeves between: saideshells fitting. the bearing shell. and having outersur faces conforming to and. fitting; said inner sun-- face of said:pioking shell, and means s upported by said arm limiting endwisemovement of said sleeves in a directionlaway fromeach other. andparalleltosaid gudgeon,: I I H 5.. In picking mechanism for a loom 'havingea; picking arm and agudgeon-thereon; a cylindrical. bearing shell supported by and rotatable-caroundz said gudgeon, a picking shell-surrounding; and spaced from the bearing. shell,;one of said-shells having a surface facing-the other-shell conveys toward the latter in cross sectionparallel tosaid gudgeon and formed with two oppositely inclined. conical surfaces, a pair of inherently resilient? soft elastic sleeves between the shells; each sleeve having a conical outer'surface to,= engage;- one of said conical surfaces: of saidone shell said sleeves fittingthe other shell, and means supported: by' the arm restricting endwisew mover-- ment of said sleeves away from eachqother and: parallel to the gudgeon. a

6; In picking mechanism for'a loom having; as picking arm and a gudgeon thereon, a. cylindrical bearing shell supportedby and rotatable;- around said gudgeon, apicking shellsurrounds,

ing and spaced from the bearing'shell; theroadr 'jacent surfaces of said shells whichex-tendgenorally in the direction of the length? of the gudgeon being separated by "a space, said shellsl being so formed that. said adjacent. surfaces are I relatively close toeach other near the longitudinal center of the shells and are relatively, farther from each other at t'he-ends of: the shells; and inherently soft elastic sleeve means between said shells substantially filling; saidwspaceflandi frictionallycontacting saidadjacent; surfaces;

GABRIEL'C. BEAT-RICE;

REFERENCES CITED] 7 The following references are .of record'in the file of this patent:

Great Britain Aug ll 51936 

